1975 Datsun 280z FSM - Spooled up Racing

Automatic Transmission
"D 3 " RANGE (TOP GEAR)
In 3rd gear position, the front and
rear clutches are engaged. The power
flow takes place through the input
shaft into rear clutch drum. The rear
clutch drum rotates the steel drive
plates of the rear clutch and the lined
drive plates of the rear clutch and the
lined drive plates of the front clutch.
The rear clutch directs the power flow
through the rear clutch hub and front
internal gear to the front planet
carrier.
The front clutch directs the power
flow through the connecting shell to
the sun gear. With the sun gear and the
rear clutch hub driven at the same
speed, the front planet assembly is
forced to rotate the output shaft at
the same speed in the direction to
provide the top gear.
AT082
Fig. AT-36 Power transmission during "D3 " range
fgj «m
AT083
Fig. AT-37 Operation of each mechanism "D3 "range
When the car speed further increases
while running at "D 2 " range
(2nd gear) and the governor pressure
(15) exceeds the combined force of
the spring of the "2nd-3rd" shift valve
(4) and the throttle pressure (19), the
"2nd-3rd" shift valve (4) moves, and
the line pressure (8) acts to release the
front clutch and band servo through
the line pressure (10).
Kange
Park
Reverse
Neutral
Dl Low
Drive D2 Second
Gear
ratio
2.182
2.458
1.458
Clutch
Front Rear
on
on
on
Low&
reverse
brake
on
on
Band servo
Operation Release
on
on
One
way
clutch
on
Parking
pawl
on
D3
Top
1.000
on
on
(on)
on
2 Second
1.458
on
on
1
12 Second
11 Low
1.458
2.458
on
on
on
on
AT-24